918353081 has 2 divisors, whose sum is σ = 918353082. Its totient is φ = 918353080.

The previous prime is 918353071. The next prime is 918353089. The reversal of 918353081 is 180353819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 605947456 + 312405625 = 24616^2 + 17675^2 .

It is an emirp because it is prime and its reverse (180353819) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 918353081 - 2⁶ = 918353017 is a prime.

It is a super-2 number, since 2×918353081² = 1686744762764385122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (918353089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459176540 + 459176541.

It is an arithmetic number, because the mean of its divisors is an integer number (459176541).

Almost surely, 2^918353081 is an apocalyptic number.

It is an amenable number.

918353081 is a deficient number, since it is larger than the sum of its proper divisors (1).

918353081 is an equidigital number, since it uses as much as digits as its factorization.

918353081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 918353081 is about 30304.3409596711. The cubic root of 918353081 is about 972.0081263045.

The spelling of 918353081 in words is "nine hundred eighteen million, three hundred fifty-three thousand, eighty-one".